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Test indicator

  • US 4,142,295 A
  • Filed: 11/30/1977
  • Issued: 03/06/1979
  • Est. Priority Date: 12/28/1976
  • Status: Expired due to Term
First Claim
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1. A test indicator comprising, a measuring arm, a cam connected to the measuring arm and pivoted to an end of a holder, a measuring tip secured to the end of said measuring arm;

  • an intermediate shaft mounted in said holder for axial displacement;

    cooperating means on said cam and said intermediate shaft for displacing said shaft axially in response to pivotal movement of the measuring arm and comprising a contact surface on said said shaft and facing toward said cam, and a pair of spherically curved contact members on said cam and engaging the contact surface of the shaft, said contact members being on opposite sides of and spaced the same distance from the axis of said shaft;

    a casing;

    means in said casing for magnifying the displacement of said intermediate shaft;

    means for mounting said holder on said casing for rotational adjustment of said holder with respect to the casing about the axis of said shaft and wherein said holder has a plurality of recesses circumferentially spaced apart at specific angles around its body;

    a ball engagable in said recesses is held in the casing;

    said ball is urged toward said body by a spring, and a screw threaded into the casing provides for adjusting the force of said spring.

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